diff --git a/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Design/TransportExport.razor b/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Design/TransportExport.razor
index b9f2bd75..1b58a542 100644
--- a/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Design/TransportExport.razor
+++ b/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Design/TransportExport.razor
@@ -138,6 +138,13 @@
                 @RenderCheckboxList(_smtpConfigs, s => s.Id, s => s.Host, _selectedSmtpConfigs)
             </fieldset>
 
+            @* S10c: SMS provider configs, mirroring the SMTP section above. Labelled by
+               AccountSid (the bundle key); the secret AuthToken is never rendered. *@
+            <fieldset class="mb-4" data-testid="group-sms-configs">
+                <legend class="h6">SMS Configurations</legend>
+                @RenderCheckboxList(_smsConfigs, s => s.Id, s => s.AccountSid, _selectedSmsConfigs)
+            </fieldset>
+
             <fieldset class="mb-4" data-testid="group-api-methods">
                 <legend class="h6">API Methods</legend>
                 @RenderCheckboxList(_apiMethods, m => m.Id, m => m.Name, _selectedApiMethods)
@@ -354,6 +361,11 @@
                         {
                             <li>SmtpConfig: @s.Host</li>
                         }
+                        @* S10c: SMS configs in the closure, mirroring SmtpConfig above; AccountSid only, never AuthToken. *@
+                        @foreach (var s in _resolved.SmsConfigs.OrderBy(s => s.AccountSid, StringComparer.OrdinalIgnoreCase))
+                        {
+                            <li>SmsConfig: @s.AccountSid</li>
+                        }
                         @* Inbound API keys are not transported (re-arch C4) — methods only. *@
                         @foreach (var m in _resolved.ApiMethods.OrderBy(m => m.Name, StringComparer.OrdinalIgnoreCase))
                         {
@@ -447,8 +459,8 @@
             {
                 <div class="alert alert-warning" role="alert" data-testid="secrets-warning">
                     <strong>@_secretCount</strong> secret @(_secretCount == 1 ? "field" : "fields")
-                    will be encrypted (external-system credentials, SMTP credentials, and database
-                    connection strings).
+                    will be encrypted (external-system credentials, SMTP credentials, SMS auth
+                    tokens, and database connection strings).
                 </div>
             }
             else
@@ -495,7 +507,7 @@
                 <div class="alert alert-danger" data-testid="unencrypted-confirm">
                     <strong>Unencrypted export</strong> — the bundle will contain all secret fields
                     in plaintext. Anyone with the file can read external-system credentials, SMTP
-                    passwords, and database connection strings. The audit log will record this as
+                    passwords, SMS auth tokens, and database connection strings. The audit log will record this as
                     <code>UnencryptedBundleExport</code>.
                     <div class="mt-2 d-flex gap-2">
                         <button class="btn btn-sm btn-danger" @onclick="ConfirmUnencryptedExport">
diff --git a/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Design/TransportExport.razor.cs b/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Design/TransportExport.razor.cs
index a843ba33..ade47607 100644
--- a/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Design/TransportExport.razor.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Design/TransportExport.razor.cs
@@ -72,6 +72,9 @@ public partial class TransportExport : ComponentBase
     private List<DatabaseConnectionDefinition> _dbConnections = new();
     private List<NotificationList> _notificationLists = new();
     private List<SmtpConfiguration> _smtpConfigs = new();
+    // S10c: SMS provider configs, mirroring _smtpConfigs. Keyed by AccountSid in the
+    // bundle; the wizard selects by entity id (same as SMTP) and never surfaces AuthToken.
+    private List<SmsConfiguration> _smsConfigs = new();
     // Inbound API keys are not transported between environments (re-arch C4); only methods.
     private List<ApiMethod> _apiMethods = new();
     // M8 (E1): site/instance-scoped export. Sites are listed flat; each site's
@@ -90,6 +93,8 @@ public partial class TransportExport : ComponentBase
     private readonly HashSet<int> _selectedDbConnections = new();
     private readonly HashSet<int> _selectedNotificationLists = new();
     private readonly HashSet<int> _selectedSmtpConfigs = new();
+    // S10c: SMS provider config selection, mirroring _selectedSmtpConfigs.
+    private readonly HashSet<int> _selectedSmsConfigs = new();
     // No _selectedApiKeys: inbound API keys are not transported (re-arch C4).
     private readonly HashSet<int> _selectedApiMethods = new();
     // M8 (E1): site/instance selection backed by entity primary keys, matching the
@@ -138,6 +143,8 @@ public partial class TransportExport : ComponentBase
             _dbConnections = (await ExternalRepo.GetAllDatabaseConnectionsAsync()).ToList();
             _notificationLists = (await NotificationRepo.GetAllNotificationListsAsync()).ToList();
             _smtpConfigs = (await NotificationRepo.GetAllSmtpConfigurationsAsync()).ToList();
+            // S10c: SMS provider configs, mirroring the SMTP load path above.
+            _smsConfigs = (await NotificationRepo.GetAllSmsConfigurationsAsync()).ToList();
             // Inbound API keys are not transported (re-arch C4) — only methods are loaded.
             _apiMethods = (await InboundApiRepo.GetAllApiMethodsAsync()).ToList();
 
@@ -199,6 +206,7 @@ public partial class TransportExport : ComponentBase
         || _selectedDbConnections.Count > 0
         || _selectedNotificationLists.Count > 0
         || _selectedSmtpConfigs.Count > 0
+        || _selectedSmsConfigs.Count > 0
         || _selectedApiMethods.Count > 0
         || _selectedSites.Count > 0
         || _selectedInstances.Count > 0;
@@ -247,6 +255,9 @@ public partial class TransportExport : ComponentBase
             // already-selected owning site.
             SiteIds = _selectedSites.ToList(),
             InstanceIds = _selectedInstances.ToList(),
+            // S10c: SMS provider config ids feed the resolver's SmsConfigurationIds,
+            // exactly as SmtpConfigurationIds above (init-only, trailing additive shape).
+            SmsConfigurationIds = _selectedSmsConfigs.ToList(),
         };
     }
 
@@ -314,6 +325,11 @@ public partial class TransportExport : ComponentBase
         {
             if (!string.IsNullOrEmpty(smtp.Credentials)) count++;
         }
+        // S10c: SMS provider AuthToken is a secret, mirroring SMTP Credentials above.
+        foreach (var sms in resolved.SmsConfigs)
+        {
+            if (!string.IsNullOrEmpty(sms.AuthToken)) count++;
+        }
         foreach (var db in resolved.DatabaseConnections)
         {
             if (!string.IsNullOrEmpty(db.ConnectionString)) count++;
@@ -440,6 +456,7 @@ public partial class TransportExport : ComponentBase
         _selectedDbConnections.Clear();
         _selectedNotificationLists.Clear();
         _selectedSmtpConfigs.Clear();
+        _selectedSmsConfigs.Clear();
         _selectedApiMethods.Clear();
         _selectedSites.Clear();
         _selectedInstances.Clear();
diff --git a/tests/ZB.MOM.WW.ScadaBridge.CentralUI.Tests/Pages/Design/TransportExportPageTests.cs b/tests/ZB.MOM.WW.ScadaBridge.CentralUI.Tests/Pages/Design/TransportExportPageTests.cs
index da90301c..53c26c63 100644
--- a/tests/ZB.MOM.WW.ScadaBridge.CentralUI.Tests/Pages/Design/TransportExportPageTests.cs
+++ b/tests/ZB.MOM.WW.ScadaBridge.CentralUI.Tests/Pages/Design/TransportExportPageTests.cs
@@ -129,6 +129,9 @@ public class TransportExportPageTests : BunitContext
         var db = new DatabaseConnectionDefinition("Hist", "Server=.;") { Id = 30 };
         var notifList = new NotificationList("Ops") { Id = 40 };
         var smtp = new SmtpConfiguration("smtp.example.com", "Basic", "no-reply@example.com") { Id = 50 };
+        // S10c: an SMS provider config, mirroring the SMTP entry above. Labelled by
+        // AccountSid; the AuthToken is a secret and must never reach the markup.
+        var sms = new SmsConfiguration("AC123", "+15551230001") { Id = 60, AuthToken = "super-secret-token" };
         // Inbound API keys are not transported between environments (re-arch C4) — the
         // export page no longer offers a keys selection list, only API methods.
         var apiMethod = new ApiMethod("CreateOrder", "// noop") { Id = 70 };
@@ -147,6 +150,8 @@ public class TransportExportPageTests : BunitContext
             .Returns(Task.FromResult<IReadOnlyList<NotificationList>>(new List<NotificationList> { notifList }));
         _notificationRepo.GetAllSmtpConfigurationsAsync(Arg.Any<CancellationToken>())
             .Returns(Task.FromResult<IReadOnlyList<SmtpConfiguration>>(new List<SmtpConfiguration> { smtp }));
+        _notificationRepo.GetAllSmsConfigurationsAsync(Arg.Any<CancellationToken>())
+            .Returns(Task.FromResult<IReadOnlyList<SmsConfiguration>>(new List<SmsConfiguration> { sms }));
         _inboundApiRepo.GetAllApiMethodsAsync(Arg.Any<CancellationToken>())
             .Returns(Task.FromResult<IReadOnlyList<ApiMethod>>(new List<ApiMethod> { apiMethod }));
 
@@ -163,6 +168,7 @@ public class TransportExportPageTests : BunitContext
             "group-db-connections",
             "group-notification-lists",
             "group-smtp-configs",
+            "group-sms-configs",
             "group-api-methods",
         })
         {
@@ -180,6 +186,9 @@ public class TransportExportPageTests : BunitContext
         Assert.Contains("Hist", cut.Markup);
         Assert.Contains("Ops", cut.Markup);
         Assert.Contains("smtp.example.com", cut.Markup);
+        // S10c: the SMS config shows its AccountSid label, never its secret AuthToken.
+        Assert.Contains("AC123", cut.Markup);
+        Assert.DoesNotContain("super-secret-token", cut.Markup);
         Assert.Contains("CreateOrder", cut.Markup);
 
         // Next button is disabled while no selection exists.
@@ -427,6 +436,89 @@ public class TransportExportPageTests : BunitContext
             Arg.Any<CancellationToken>());
     }
 
+    // ─────────────────────────────────────────────────────────────────────
+    // Test 8 (S10c): the Step 1 SMS section renders available SMS configs by
+    // AccountSid (never AuthToken), and ticking one flows its entity id into
+    // ExportSelection.SmsConfigurationIds — mirroring the SMTP-by-Host contract.
+    // ─────────────────────────────────────────────────────────────────────
+    [Fact]
+    public async Task Step4_export_carries_selected_sms_configuration_ids()
+    {
+        var sms = new SmsConfiguration("AC777", "+15559990001") { Id = 77, AuthToken = "do-not-leak" };
+        _notificationRepo.GetAllSmsConfigurationsAsync(Arg.Any<CancellationToken>())
+            .Returns(Task.FromResult<IReadOnlyList<SmsConfiguration>>(new List<SmsConfiguration> { sms }));
+        // The resolver fetches the selected SMS config by id when building the closure.
+        _notificationRepo.GetSmsConfigurationByIdAsync(77, Arg.Any<CancellationToken>())
+            .Returns(Task.FromResult<SmsConfiguration?>(sms));
+
+        _exporter
+            .ExportAsync(
+                Arg.Any<ExportSelection>(),
+                Arg.Any<string>(),
+                Arg.Any<string>(),
+                Arg.Any<string?>(),
+                Arg.Any<CancellationToken>())
+            .Returns(_ => Task.FromResult<Stream>(new MemoryStream(new byte[] { 0x50, 0x4b, 0x03, 0x04 })));
+
+        var cut = Render<TransportExportPage>();
+        cut.WaitForState(() => cut.Markup.Contains("AC777"));
+
+        // The SMS section renders the available config by AccountSid; its secret
+        // AuthToken is never rendered.
+        Assert.NotNull(cut.Find("[data-testid='group-sms-configs']"));
+        Assert.DoesNotContain("do-not-leak", cut.Markup);
+
+        // Tick the SMS config checkbox (id pattern mirrors the SMTP flat-list wiring).
+        cut.Find("#chk-SmsConfiguration-77").Change(true);
+
+        // Step 1 → 2 → 3 → export.
+        await cut.FindAll("button").First(b => b.TextContent.Trim() == "Next").ClickAsync(new());
+        cut.WaitForAssertion(() => Assert.Contains("Selected by you", cut.Markup));
+        await cut.FindAll("button").First(b => b.TextContent.Trim() == "Next").ClickAsync(new());
+        cut.WaitForAssertion(() => Assert.Contains("Passphrase", cut.Markup));
+
+        cut.Find("#passphrase").Input("hunter2hunter2");
+        cut.Find("#passphrase-confirm").Input("hunter2hunter2");
+        await cut.FindAll("button").First(b => b.TextContent.Trim() == "Export").ClickAsync(new());
+        cut.WaitForAssertion(() => Assert.Contains("Bundle ready", cut.Markup));
+
+        await _exporter.Received(1).ExportAsync(
+            Arg.Is<ExportSelection>(s => s.SmsConfigurationIds.Contains(77)),
+            "alice",
+            "test-cluster",
+            "hunter2hunter2",
+            Arg.Any<CancellationToken>());
+    }
+
+    // ─────────────────────────────────────────────────────────────────────
+    // Test 9 (S10c): CountSecrets counts a populated SMS AuthToken, mirroring
+    // the SMTP Credentials contribution to the Step 3 secrets banner.
+    // ─────────────────────────────────────────────────────────────────────
+    [Fact]
+    public void CountSecrets_includes_sms_configuration_auth_token()
+    {
+        var smsWithToken = new SmsConfiguration("AC1", "+15551110000") { Id = 1, AuthToken = "tok" };
+        var smsNoToken = new SmsConfiguration("AC2", "+15552220000") { Id = 2, AuthToken = null };
+
+        var resolved = new ResolvedExport(
+            TemplateFolders: Array.Empty<TemplateFolder>(),
+            Templates: Array.Empty<Template>(),
+            SharedScripts: Array.Empty<SharedScript>(),
+            ExternalSystems: Array.Empty<ExternalSystemDefinition>(),
+            ExternalSystemMethods: Array.Empty<ExternalSystemMethod>(),
+            DatabaseConnections: Array.Empty<DatabaseConnectionDefinition>(),
+            NotificationLists: Array.Empty<NotificationList>(),
+            SmtpConfigs: Array.Empty<SmtpConfiguration>(),
+            ApiMethods: Array.Empty<ApiMethod>(),
+            ContentManifest: Array.Empty<ManifestContentEntry>())
+        {
+            SmsConfigs = new List<SmsConfiguration> { smsWithToken, smsNoToken },
+        };
+
+        // Only the config with a non-empty AuthToken counts.
+        Assert.Equal(1, TransportExportPage.CountSecrets(resolved));
+    }
+
     // ─────────────────────────────────────────────────────────────────────
     // Static helpers — exercised directly so the file-naming + secret-count
     // contract is unit-pinned independently of the rendering surface.